Having a GoPro while fishing means you can film all your epic catches, but what happens when the camera captures something inexplicable?

Check out what this fisherman’s GoPro filmed, and see if you can identify it.

This YouTube user had this to say about the video: “I was about half a mile off shore when this sighting occurred. I obviously saw something out of my peripheral vision, but had no idea what it was. Out in the Wild ocean of Big Sur you can see anything from Killer Whales, dolphins, Great White Sharks, Grey Whales, Otters and Sea lions.”

It’s unclear exactly what that could have been, but at least the GoPro was watching this guy’s back.